Add gPXE into the source tree; build unified imagesyslinux-3.70-pre7

1 files changed, 243 insertions, 0 deletions

diff --git a/gpxe/src/arch/i386/include/callbacks_arch.h b/gpxe/src/arch/i386/include/callbacks_arch.h
new file mode 100644
index 00000000..f9cba488
--- /dev/null
+++ b/gpxe/src/arch/i386/include/callbacks_arch.h
@@ -0,0 +1,243 @@
+/* Callout/callback interface for Etherboot
+ *
+ * This file provides the mechanisms for making calls from Etherboot
+ * to external programs and vice-versa.
+ *
+ * Initial version by Michael Brown <mbrown@fensystems.co.uk>, January 2004.
+ *
+ * $Id$
+ */
+
+#ifndef CALLBACKS_ARCH_H
+#define CALLBACKS_ARCH_H
+
+/* Skip the definitions that won't make sense to the assembler */
+#ifndef ASSEMBLY
+
+/* Struct to hold general-purpose register values.  PUSHAL and POPAL
+ * can work directly with this structure; do not change the order of
+ * registers.
+ */
+typedef struct {
+	union {
+		uint16_t di;
+		uint32_t edi;
+	};
+	union {
+		uint16_t si;
+		uint32_t esi;
+	};
+	union {
+		uint16_t bp;
+		uint32_t ebp;
+	};
+	union {
+		uint16_t sp;
+		uint32_t esp;
+	};
+	union {
+		struct {
+			uint8_t bl;
+			uint8_t bh;
+		} PACKED;
+		uint16_t bx;
+		uint32_t ebx;
+	};
+	union {
+		struct {
+			uint8_t dl;
+			uint8_t dh;
+		} PACKED;
+		uint16_t dx;
+		uint32_t edx;
+	};
+	union {
+		struct {
+			uint8_t cl;
+			uint8_t ch;
+		} PACKED;
+		uint16_t cx;
+		uint32_t ecx;
+	};
+	union {
+		struct {
+			uint8_t al;
+			uint8_t ah;
+		} PACKED;
+		uint16_t ax;
+		uint32_t eax;
+	};
+} regs_t;
+
+/* Struct to hold segment register values.  Don't change the order;
+ * many bits of assembly code rely on it.
+ */
+typedef struct {
+	uint16_t cs;
+	uint16_t ss;
+	uint16_t ds;
+	uint16_t es;
+	uint16_t fs;
+	uint16_t gs;
+} PACKED seg_regs_t;
+
+/* Struct for a GDT descriptor */
+typedef struct {
+		uint16_t limit;
+		uint32_t address;
+		uint16_t padding;
+} PACKED gdt_descriptor_t;
+
+/* Struct for a GDT entry.  Use GDT_SEGMENT() to fill it in.
+ */
+typedef struct {
+	uint16_t limit_0_15;
+	uint16_t base_0_15;
+	uint8_t base_16_23;
+	uint8_t accessed__type__sflag__dpl__present;
+	uint8_t limit_16_19__avl__size__granularity;
+	uint8_t base_24_31;
+} PACKED gdt_segment_t;
+
+#define GDT_SEGMENT(base,limit,type,sflag,dpl,avl,size,granularity) \
+	( (gdt_segment_t) { \
+		( (limit) & 0xffff ), \
+		( (base) & 0xffff ), \
+		( ( (base) >> 16 ) & 0xff ), \
+		( ( 1 << 0 ) | ( (type) << 1 ) | \
+		  ( (sflag) << 4 ) | ( (dpl) << 5 ) | ( 1 << 7 ) ), \
+		( ( (limit) >> 16 ) | \
+		  ( (avl) << 4 ) | ( (size) << 5 ) | ( (granularity) << 7 ) ),\
+		( (base) >> 24 ) \
+	} )
+#define GDT_SEGMENT_BASE(gdt_segment) \
+	( (gdt_segment)->base_0_15 | \
+	  (gdt_segment)->base_16_23 << 16 | \
+	  (gdt_segment)->base_24_31 << 24 )
+#define GDT_SEGMENT_LIMIT(gdt_segment) \
+	( (gdt_segment)->limit_0_15 | \
+	  ( ( (gdt_segment)->limit_16_19__avl__size__granularity \
+	      & 0xf ) << 16 ) )
+#define GDT_SEGMENT_GRANULARITY(gdt_segment) \
+	( ( (gdt_segment)->limit_16_19__avl__size__granularity \
+	    & 0x80 ) >> 7 )
+#define GDT_SEGMENT_TYPE(gdt_segment) \
+	( ( (gdt_segment)->accessed__type__sflag__dpl__present & 0x0e ) >> 1 )
+#define GDT_SEGMENT_SIZE(gdt_segment) \
+	( ( (gdt_segment)->limit_16_19__avl__size__granularity \
+	    & 0x60 ) >> 5 )
+
+#define GDT_TYPE_DATA			(0x0)
+#define GDT_TYPE_STACK			(0x2)
+#define GDT_TYPE_WRITEABLE		(0x1)
+#define GDT_TYPE_CODE			(0x6)
+#define GDT_TYPE_EXEC_ONLY_CODE		(0x4)
+#define GDT_TYPE_CONFORMING		(0x1)
+#define GDT_SFLAG_SYSTEM		(0)
+#define GDT_SFLAG_NORMAL		(1)
+#define GDT_AVL_NORMAL			(0)
+#define GDT_SIZE_16BIT			(0x0)
+#define GDT_SIZE_32BIT			(0x2)
+#define GDT_SIZE_64BIT			(0x1)
+#define GDT_SIZE_UNKNOWN		(0x3)
+#define GDT_GRANULARITY_SMALL		(0)
+#define GDT_GRANULARITY_LARGE		(1)
+#define GDT_SEGMENT_NORMAL(base,limit,type,size,granularity) \
+	GDT_SEGMENT ( base, limit, type, \
+		      GDT_SFLAG_NORMAL, 0, GDT_AVL_NORMAL, \
+		      size, granularity )
+
+/* Protected mode code segment */
+#define GDT_SEGMENT_PMCS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xfffff, GDT_TYPE_CODE | GDT_TYPE_CONFORMING, \
+	GDT_SIZE_32BIT, GDT_GRANULARITY_LARGE )
+#define GDT_SEGMENT_PMCS_PHYS GDT_SEGMENT_PMCS(0)
+/* Protected mode data segment */
+#define GDT_SEGMENT_PMDS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xfffff, GDT_TYPE_DATA | GDT_TYPE_WRITEABLE, \
+	GDT_SIZE_32BIT, GDT_GRANULARITY_LARGE )
+#define GDT_SEGMENT_PMDS_PHYS GDT_SEGMENT_PMDS(0)
+/* Real mode code segment */
+/* Not sure if there's any reason to use GDT_TYPE_EXEC_ONLY_CODE
+ * instead of just GDT_TYPE_CODE, but that's what our old GDT did and
+ * it worked, so I'm not changing it.
+ */
+#define GDT_SEGMENT_RMCS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xffff, GDT_TYPE_EXEC_ONLY_CODE | GDT_TYPE_CONFORMING, \
+	GDT_SIZE_16BIT, GDT_GRANULARITY_SMALL )
+/* Real mode data segment */
+#define GDT_SEGMENT_RMDS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xffff, GDT_TYPE_DATA | GDT_TYPE_WRITEABLE, \
+	GDT_SIZE_16BIT, GDT_GRANULARITY_SMALL )
+/* Long mode code segment */
+#define GDT_SEGMENT_LMCS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xfffff, GDT_TYPE_CODE | GDT_TYPE_CONFORMING, \
+	GDT_SIZE_64BIT, GDT_GRANULARITY_LARGE )
+#define GDT_SEGMENT_LMCS_PHYS GDT_SEGMENT_LMCS(0)
+/* Long mode data segment */
+/* AFIACT, GDT_SIZE_64BIT applies only to code segments */
+#define GDT_SEGMENT_LMDS(base) GDT_SEGMENT_NORMAL ( \
+	base, 0xfffff, GDT_TYPE_DATA | GDT_TYPE_WRITEABLE, \
+	GDT_SIZE_32BIT, GDT_GRANULARITY_LARGE )
+#define GDT_SEGMENT_LMDS_PHYS GDT_SEGMENT_LMDS(0)
+
+/* Template for creating GDT structures (including segment register
+ * lists), suitable for passing as parameters to external_call().
+ */
+#define GDT_STRUCT_t(num_segments) \
+	struct { \
+		gdt_descriptor_t descriptor; \
+		gdt_segment_t segments[num_segments]; \
+	} PACKED
+/* And utility function for filling it in */
+#define GDT_ADJUST(structure) { \
+	(structure)->descriptor.address = \
+		virt_to_phys(&((structure)->descriptor.limit)); \
+	(structure)->descriptor.limit = \
+		sizeof((structure)->segments) + 8 - 1; \
+	(structure)->descriptor.padding = 0; \
+}
+
+/* Data passed in to in_call() by assembly wrapper.
+ */
+typedef struct {
+	regs_t		regs;
+	seg_regs_t	seg_regs;
+	gdt_descriptor_t gdt_desc;
+	uint32_t	flags;
+	struct {
+		uint32_t offset;
+		uint32_t segment;
+	} ret_addr;
+} PACKED i386_pm_in_call_data_t;
+
+typedef struct {
+	seg_regs_t	seg_regs;
+	union {
+		uint16_t	pad;
+		uint16_t	prefix_sp;
+	};
+	uint16_t	flags;
+	struct {
+		uint16_t offset;
+		uint16_t segment;
+	} ret_addr;
+	uint32_t orig_opcode;
+} PACKED i386_rm_in_call_data_t;
+
+typedef struct {
+	i386_pm_in_call_data_t *pm;
+	i386_rm_in_call_data_t *rm;
+} i386_in_call_data_t;
+#define in_call_data_t i386_in_call_data_t
+
+/* Function prototypes
+ */
+extern int install_rm_callback_interface ( void *address, size_t available );
+
+#endif /* ASSEMBLY */
+
+#define RM_IN_CALL	(0)
+#define RM_IN_CALL_FAR	(2)
+
+#endif /* CALLBACKS_ARCH_H */